Our ability to harness nuclear energy has existed for quite a while now and yet nuclear energy is only responsible for providing 10% of the world's energy. There are 439 nuclear reactors spread across 31 countries with 160 more reactors planned for the future and yet nuclear energy has stagnated since the 80's. What gives?

Kurz Gesagt provides a simple explainer on what nuclear energy is, how it works and its limitations (and dangers) in the video below.